Rubber tire and its attachment and detachment to and from wheels.



E. B. KILLEN.

RUBBER TIRE AND iTS ATTACHMENT AND DETACHMENT TO AND FROM WHEELS.

APPLICATWN FILED FEB. 88. 1914.

I LQQQYfi Patented M85115, 1917.

EDWARD BEIGE KILLER, OF LOISlDON, ENGLAND.

RUBBER TIRE AND ITS ATTACHMENT AND DETACHMENT T ANlJ FROM WHEELS.

To all whom it may concern:

' and Ireland, and residing at 27 Queen Victoria street, London, E. C, England, have invented certain newand useful Improve ments in and Relating to Rubber Tires and Their Attachment and Detachment to and from Wheels, of which the following is a specification.

This invention relates to rubber tires of the type having an upstanding tread that is to say, one which has substantially straight sides and has a flat treading surface so that the tread does not substantially increase in width with increase of load, and also relates to rubber tires of the type having an air chamber of roughly triangular shape in cross section.

The invention more particularly relatesto air cushion tires as described in my prior application for U. S. Patent Serial No. 669754, filed January 6, 1912, and therefore, this invention may be conveniently described with reference thereto.

An object of the invention is to provide a tread possessing eflicient non-skiddin qualities even when upon treacherous sur aces of grease, mud, ice or snow, or on wood pavement, asphalt or stone sets, such tread also reventing slipping or skidding upon suden application of the brakes whereby a car may be pulled up within a few yards even when traveling at a considerable speed.

A further object of the invention is to provide an air chamber of such a shape that no internal friction takes place while the tire is I under load, thus preventingdisintegration or cracking taking place throughout the life of the tire.

In the accompanying drawings,

Figure 1 is a cross section of a tire of the type described in my prior application above referred to, showing the formation of tread according to the present invention; I

Fig. 2 is a plan view of the tread portion .of Fig. 1, showing the shape and arrange ment of the cavities according to the invention;

Fig. 3 illustrates the tire shown in Fig. 1 under a heavy load;

Fig. 4 is a side elevation of part of a wheel with a tire under compression corresponding to Fig. 3'; and illustrates the cir eumferential amount of tread in ground contactunder a heavy load.

- Specification of Letters Patent.

Patented May 15, 19111.

Application filed February 18, 1314. Serial No. 819,438.

In carrying out the invention according to one mode as applied to a tire such as described in my prior specification above re-.

ferrcd to, I mold the part of the rubber tread 1 capable of being Worn away, with right and left circumferential treading ribs 2 and 3 having suitable supporting stay ribs 4e formed at intervals obliquely between the treadingribs, thereby providing a number of open spaces or cavities 5 of roughly triangular shape in plan. The construction of tread ng and stay ribs forms the triangular cavities so that the base of each triangle is upon the same circumferential line as the apex of the next and centrally over the apex of the air chamber of the tire. The corners of the triangular space are formed so that acuteangles are avoided. To effect this the angles or corners may be molded blunt or with a slight flat or extra wall such as 6 so as to form right or obtuse angles at the junc tion' of any two surfaces, thereby preventing friction'or crackingoccurring on the surfaces or sides of each space when the rubber of the tread is put under compression in carrying its load. These open spaces are surrounded by. walls ofinniform height and ai'e located centrally around the'tread circumference after the manner shown in the drawings.

The stay tread ribs 4: connecting and sup- Which jointhe trend 1 with base beads 8 -form1ng an air chamber 9 of triangular or gable-like cross section. The inner surface of the side walls 7 are preferablyconvex to increase the tendency of the walls to move inward when the tire is under load. The base beads are provided with extended toes, 10 which are preferably formed with a curved inner surface 11 to serve as a bed for the endless retaining run 12 which is adapted to fit inside the chamber 9 andconvert it into a tube of gable-like or triangular shape. The air chamber thus formed may he made airtight by the engagement of retaining rim 12 with the toes 10 and by the engagement of these toes with the wheel rim and by the engagem'e'nt of the side flanges iiiidespecially their hook portions 15 with thebeads 8. The compression of the beads and adjacent base portions of the tire by the side flanges and hooks-l5 further assists in forcing the toes, into firm engagement with wheel rim and retaining rim 12. p

Between"v each toe l0 and .the innersurface of the correspondin side wall 7' extra walls 13 are formed so t at the base of the air chamber is provided with right angular or obtuse, instead of acute angles. These two walls may slope outward from the toes 10, meeting the walls 7 M14, therebyforming the widest part, of the air chamber, outside the retaining rim but inside the hooked portion 15 of the side flanges of the wheel.-

When the tireis under load the side walls are bulged inward and the provision of the walls 13 causes this movement orlhinging action to take place in a locality outside the retaining rim 1:2 but inside the hooked portion 15 of the side flanges. the hinging action were to take place outside the hooked flange there would be a danger of a distortion-of the walls outwardunder some c1rcumstances.'

-The inner surfaces of the walls do not' meet or. merge into 'one another at the apex war the air chamber but are separted by another extra wall in theforni of. an-mwardly.

unbroken pl n treading surfacesaud a row' of deep ties located centrally around the ul'istandi'ri'g tread above the ap'exof the gal'ile-like air chamben'said cavities being of substantially triangularshapejin plan and arranged so that the baseof each trlangular cavity lies upon the same circumferential line as the apex of the next and each corner of the triangularcavity being chamber and I ut of contact with the end-.

described my invention made blunt by means of extra walls,'tread surface of the tire being substantially flat 6.:

transversely and extending a considerable distance beyond the cavities at each side when the tread'surface Its-free from compression so that the cavities are brought into sealed contact with the road surface substantially immediately upon engagement therewith. 5 r 2. A rubber tubetire comprising an up-' standing tread, base beads, thick sidewalls for carrying the load inclined toward one another, joining the treadwithsaid 'base 'beadsand an endless retaining rim which together with said side walls form an airtight chamber'of gable-like shape in crosssection, a rubber formation consisting of ex tended toes on the inner side of said beads and ashortflextra side wall at each of the corners of the base of the gable-like 'air chamber inclined outward and arranged between each extended toe and the adjacentportion of its correspondingsidewall out of contact with the endless'retaining rim, the junctions of the extra walls with .theside walls being the widest part of the air lessmetaining im,-as and for the purposes described. i I

. A rubber tube tire comprising an up-' standing tread, base beads, thick side walls for. carrying the load inclined toward one another joining the tread with said base beads and forming an airtight-chamber between them of gabledike shape in cross section a rubber formation consisting of ex tended toes on the inner side of said'beads.

a, short extra wall at each ofthe corners of.

adjacent portion of its corresponding-side i .walls' and an extra wall inthe foru'i of an inwardly projecting rib of open 'V-shape in :cross section at the apex of the gal'ile-like air a chamber. as and for the purposes described.

testimony whereofl have signed my name -to this spec ficat n thepresence 10 of two subscribingwltne. es. e 

